Trestle and scaffold



(No Model.)

J. K. PETTY.

` TRESTLE AND SGAPFOLD.

N0. 350,153. Patented Oct. 5, 1886.

UNITED STATES PATENT UEEicE.

J AMES K. IETTY, OF OMAHA, NEBRASKA.

TRESTLE AND SCAFFOLD.

Application filed April 2.2, 1F86.

To `@ZZ w71 om, 'it may concern:

Beitknown that I, Janus li. BETTY, a citizen of the United States, residing` at Omaha, in the county ot' Douglas and State of Nebraska, haveinvented certain new and useful Improve ments in Trestles and Scattelds, and I do hereby declare the followingto bea full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

This invention relates to trcstles or scatl'olds l'or the use ol' painters. carpenters, bricklayers. and other artisaus,and lor the support ot' tables, platforms, &c.

l`he object ot' the invention is to produce a truss or trestle capable ol' being constritcted and taken apart easilyaud quickl)Y and packed in the smallest possible space Ylor removal or storage, and when vfixed together to become a strong, durable, and convenient t'russor trest'le ot'znrv height and length desired, said trestle being capable et ready use in series by builders, and also adapted as a support tor a system ol' putlog seatt'oldiug bythe use of one pairotI legs on the outer end ol' the bearer, the inner end ot' the bearer in such case resting on the walls,and t`or the support ot'tables, platt'orms, and other beariug-surlhces.

The improved truss or trestle, briell)Y described, consists ot' legs or Isupports connected together by a hinged lnace-barand having beveled upper ends, a head or clamp composed ot' a pair ot' jaws hinged or pivoted together at their bottoms and having bevel-shalmd and obliquely-extending sockets or bands on its outer faces to receive the beveled upper ends ot' the supporting-lcgs,`and iiiwardly-extending flanges to receive and grip the bearer or support for the table or planks, and a bearer having a notch or recess in its upper face or edge,wi thin which the top tlangesonthe hinged head rest, so as to produce a continuous and even bearing-surface vl'or the scali'old planks 0r table, &c.

In the accompanying drawings, Figurel represents a perspective view ol' a trestle or scaft'old support constructed according to my iniprovcinents, Fig.2, a side elevation, and Fig. 3 an end elevation, ot' one of the clamps or heads; Fig. -it/,a side elevation of one ot'thelegs; Fig. 5, a side elevation ofthe bearer. Fig. 6 shows the invention as adapted for putlog scaffolding.

" ECl-"ICATION forming part of Letters Patent No. 350,153, dated October 5, 1888.

Serial No. 199,934. (No model.)

A represents the clamp or head, which consists ot' a pair ol'jaws, B B, hinged or pivoted together at their bottom portions, as shown at C, and having'top and bottom inwardly-extending lips or flanges, D D E E, within and between which the bearer, to be presently described, is received and held, and on their opposite outer taces beveled and oblique bands or sockets F F G G.

H represents the legs or supports. which are ot' bevel form at their upper ends to permit ol' their being readily inserted within said bands or sockets F G, and held securely in position therein by the gripping contactofthe beveled form of said leg-tops and otl the sockets, and. also of being readily removed l'rom said sockcts when desired. ily l'orming the legs with beveled upper ends,said legs, when in position within the beveled and obliquetv-extending sockets, will assume an outwardly-extending angular position, and thus provide a bracing support, the obliquity and beveled shape ol said sockets insuring thc legs, when inserted therein, being grippingly held thereby.

I represents hinged brae ':bars secured to the legs t'or the purpose of securing them in their extended positions and preventing their being drawn or pushed inward while in use.

J represents the bearer upon which the scattoldplanks or table-top and the like rest". This bearer is i n i ts upper edge o r l'ace provi ded with a notch or recess, K, corresponding in length with the length ol' the top ilanges, l), ol' the clamp or head, so that when said bearer is inserted within the clam pin g-head with its bottom face or edge resting upon the bottom flanges, E, the top tlanges will enter and meet within said recess. The interior ot'said clamp when closed `is ot' equal width' to the width of the bearer and ot' a depth equal to the depth ofthe bearer at its notched portion, and as the depth ot' the notch corresponds with the thickness of the top flanges, it necessarily results that when the clamp-head is closed upon the bearer the top of the clamp and the top t'ace or edge ot' the bearer will be flush and extend in an even and con tinuous line, thus affording an even surl'ace upon which the planks or table-top, &e ma)v steadily rest.

By providing the clamp with hinge-connection at its bottom and constructing the several parts so that the legs are held in inclined posi- IOO tion, the Weight resting upon or supported by the trestle Will hold the clamp in gripping contact with the bearer, and the greater the Weight supported the more rmly will the clamp grip the bearer, owing to such construction and the v constant inclination of the legs to spread under l[he pressure of the weight placed upon thetop ofthe trestle or truss. l

y In Fig. 6 of the drawings I have represented my improvements as adapted for putlog scaffolding. In this arrangement only one pair of legs is employed and only one clamping-head, the-opposite end of the bearer v(unsupported by such clamp and legs) resting upon the wall.

Having thus described my inventio'in what I claim is l Y 1. A brace or socket :for trestles having a pair of bearer-receiving jaws hinged together at their bottom. portions, and having inwardlyextending ilanges to receive and grip the bearer and outwardly extending sockets or bands to receive the supporting-legs, substantially as set forth.

2. A trestle or scaffold platform or table support consisting of a bearer having a notch or recess in its upper face, a clamp adapted to receive and grip said bearer, and having hinged bottom portions and beveled and obliquely-extending sockets on its outer faces, legs iittingw at their upper ends within said sockets, and a hinged brace-bar connecting said legs, all as and for the purpose set forth.

The combination of the clamp herein described, having a hinge at its bottom. portion and bevel-shaped sockets or bands on its opposite sides, and the angularly-extending supporting-legs having beveled upper ends to re movabl y Iit Within said sockets or bands, substantially as set forth.

4i. The combination of the clamp herein described7 having a hinge at its bottoniportion and bevel-shaped sockets or bands on its opposite sides, and the angularly-extending supporting-legs having beveled upper ends tore movably t Within said sockets or bands, and

. the hinged brace-bar attached to said legs to prevent the ino-vement and spreading thereof, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

J AMES K. PETTY.-

XV itncsses:

J OHN XV. PETTY, JOHN W. DUNMIRE. 

